package com.day08;

public class StringbuilderTest01 {
    public static void main(String[] args) {
        int[] arr={1,2,3};
        String s=arrayToString(arr);
        System.out.println("s:"+s);
    }
    public static String arrayToString(int[] arr){
        StringBuilder sb=new StringBuilder();
        sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if(i==arr.length-1){
                sb.append(arr[i]);
            }else{
                sb.append(arr[i]+",");
            }
        }
        sb.append("]");
        String s= sb.toString();
        return s;
    }
}
